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Ceketli Kelebek Vanalar
Ceketli kelebek vanalar, ortam sıcaklığında katılaşan, kristalleşen veya koyulaşan akışkanı akışkan durumda tutar: gövde, buharın, termal yağın veya sıcak suyun dolaştığı tam bir ısıtma ceketi taşır; bitüm, kükürt, çikolata, mumlar ve yapıştırıcılar diske kadar akışkan kalır. Boy aralığı, sınıf kapsamı, gövde malzemeleri ve ağız bağlantıları RFQ'da boyut ve uygulamaya göre doğrulanır; ceket akışkanı ve sıcaklığı proses koşullarına göre seçilir. Ceket yapısı kapsama göre derecelenir: kısmi ceketler standart flanşlarla gövdenin orta bölümünü ısıtır, tam kapsam ceketler hat boyutunun bir ilki iki nominal boyut üstünde bağlantı flanşları kullanır ve hat boyutu ceketleri standart flanşlara kaynaklanır — bu yüzden yüzey-yüzey ISO 5752 "veya onaylı üretici çizimi" olarak sunulur ve termal portlar küçük vanalarda 1/2 inç NPT'ten 8 inç ve üstü gövdelerde 1 inçe büyür. Sert kaplamalı sızdırmazlık yüzeyli metal sedirler, malzemeye bağlı -29 ila 425 °C zarfının sıcak ucunu taşır. Hata yolları termaldır, mekanik değil: takma (clamp-on) ceketler akışkanın katılaştığı hava boşluklu soğuk noktalar bırakır; disk kenarında biriken ürün açma ya da kapamayı bloke eder; mil yatağında katılaşan akışkan mili bağlar — sonuncusuna buhar izlemeli mil ve sızdırmaz yataklı tasarımlar cevap verir. Montaj ceket akışkanını bir bağlantıdan sokup karşı taraftan boşaltır; sıcak ve soğuk noktalara göre halkasal boşluk boyutlandırılır ve kabul iki taraflıdır: ceket hidrostatik testi ASME B31.1'e, proses tarafı API 598'e göredir. Ürün normları kelebek normlarıdır (API 609, MSS SP-68, EN 593); ceket kabuğu borulama pratiğini izler (ASME B31.1/B31.3, B16.34); ceketli yüksek performanslı uygulamalar B16.34 basınç-sıcaklık limitleriyle Class 600'e ulaşır. Seçim; ceket ısıtma akışkanına ve sıcaklığına, akışkan kimyasına göre gövde ve sedir malzemelerine ve tahrike — manuel, pnömatik veya elektrikli — göre yapılır.
Şu ailenin parçası: Kelebek Vanalar
Son güncelleme: 2026-10
Aile özellikleri
| jacket coverage design types | Jacketed valve executions are commonly grouped by coverage: a partial jacket heats only the valve mid-section with standard flanges, a full-coverage jacket uses flanges one nominal size above the valve size, and a line-size full jacket welds to standard flanges with tapped bolt-hole inserts. Shorter end-to-end variants of each also exist. |
|---|---|
| jacket flange oversize effect | Because the jacket adds wall thickness around the body, the connecting flanges of a jacketed butterfly valve are typically one to two nominal sizes larger than the equivalent unjacketed valve; final flange dimensions must be taken from the approved manufacturer drawing rather than assumed from the line size. |
| jacket pressure and medium separation | The jacket pressure rating, heating-medium temperature and connection size are not fixed catalog values: they must be confirmed against the process conditions for each application. The heating medium must also remain fully separated from the process medium, so jacket integrity is a containment requirement, not only a heat-transfer one. |
| jacket thermal port sizing | Thermal (steam) port size is scaled to valve size: roughly half-inch NPT on small valves, three-quarter-inch on mid sizes, and one-inch NPT on valves of about 8 inch and larger. Threaded ports are standard on fabricated jackets, with flanged jacket connections available on request. |
| jacket heating medium options | Steam is the most common jacket heating medium, but hot thermal oil is also used, and jacketed valves can serve cooling duty with cold water or chilled glycol. Manufacturer selection checklists therefore ask explicitly whether the jacket medium is steam or hot oil, together with its pressure and temperature. |
| temperature range material dependent | Published temperature limits for jacketed metal-seated butterfly valves run to about 425 C, but the applicable ceiling depends on body/trim material and the sealing configuration rather than being a single valve rating. Soft-seated executions share this envelope only in their lower part; metal seating with hard-faced surfaces carries the high end. |
| hardfaced metal seat for hot service | In jacketed executions the seat faces are typically metal, with the disc sealing surface hard-faced with a cobalt-based alloy to resist wear at elevated temperature; stainless seal rings combine hard-metal and elastic sealing behavior across the low- and high-temperature ends of the range. |
| partial jacket cold spots | Add-on (clamp-on) jackets can leave air gaps between the jacket and the valve body; these cold spots let the media solidify and accumulate locally, which is why integral welded jackets that keep steam in direct contact with the body give more reliable heating on solidifying service. |
| disc edge buildup blocks closure | A thin layer of solidified product on the disc edge can prevent the valve from opening or closing, while buildup on the disc face alters its flow-control behavior. Heating only the body does not protect the disc; designs that trace steam around the disc circumference address this failure path. |
| shaft bearing solidification binding | The shaft/bearing area is the most vulnerable point for media buildup: even a small amount of solidified flow material on a bearing surface causes binding and wear. Steam-traced or purged stem designs, and sealed bearings, are countermeasures; without them, conventional body-only jacketing leaves the shaft cold. |
| clamp on jacket valve failure risk | Reliance on conventional clamp-on jacketing is itself a failure mode: where heat transfer is poor, sulfur-type media can still solidify inside the valve and the buildup leads to valve failure, particularly where shafts and discs sit far from the heat source. |
| annular space hot cold spots prevention | For fabricated jackets, maintaining sufficient annular space between the valve exterior and the inner jacket wall keeps the thermal fluid flowing unobstructed; collapsing or under-sizing this gap produces temperature inconsistencies and hot or cold spots across the heated surface. |
| jacket flow path through both connections | The jacket is routed with an inlet on one side of the body and an outlet on the opposite side, so the heating medium circulates around the body before leaving; jacket connections are installed on both body sides, and coupling size and connection form (threaded or flanged) must be specified at ordering. |
| jacket hydrostatic test and asme compliance | Fabricated jacket welds are executed to ASME B31.1/B31.3 practice with code-qualified welders, and after fabrication the jacket space is hydrostatically tested per ASME B31.1 while the process side is tested to API 598, a two-sided acceptance sequence worth requiring in purchase specifications. |
| jacketed design and flange standards | Triple-offset metal-seated butterfly valves of the type used for jacketed executions are designed to API 609, MSS SP-68 and EN 593; connecting flanges conform to ASME B16.5/B16.47, ISO 7005 or EN 1092, face-to-face to API 609/ISO 5752/EN 558, and testing to API 598 / ISO 5208. The jacket shell additionally follows piping practice (ASME B31.1/B31.3, B16.34). |
| face to face deviation for jacketed bodies | Face-to-face dimensions nominally follow ISO 5752 (and API 609/EN 558), but jacketed bodies frequently deviate from the standard table; suppliers state conformance as ISO 5752 or approved manufacturer drawing, so buyers must verify face-to-face against the jacketed drawing rather than the standard. |
| pressure class envelope of jacketed butterfly | Steam-traced jacketed high-performance butterfly executions are offered in ASME B16.34 pressure classes including Class 150 (with a derated 150DR variant), 300 and 600, in sizes from 6 to 48 inch, confirming that the jacket does not confine the product to a single class while pressure-temperature limits are taken from B16.34. |
| jba triple point heating | triple-point prevention of media solidification in the shaft and bearings, the valve body and the disc |
| jba steam through stem | steam flows directly through the stem, fully heating the bearing area |
| jba welded shaft disc interface | There is a welded interface between the shaft inlet and disc passage forming a single, integral unit, so there is no chance for steam to leak into the piping system. |
| jba disc perimeter steam path | channels the continuous steam flow from the top shaft, around the full perimeter of the disc, and out the bottom shaft |
| jba steam contact area advantage | 200% greater steam contact area |
| jba integral jacket installation | There is no chance for assembly errors in the field and there is no need for messy thermal contact cement. |
| jba design patents | Three specific U.S.A. patents have been issued based on this design (4559967, 4418889, and 4289296). |
| jba optional configurations | Optional bearing purge (steam or alternate media) Optional sealed bearings Optional double-packed stems with lantern rings Optional fire tested and high-temperature seat designs |
| jba three point system | a full 3-point valve heating system including the stem, body, and disc |
| jbb reduced port jacketed piping | Reduced Port Valves to match reducing flanges where jacketed piping systems are required. Valves can be steam jacketed and equipped with steam traced shafts, if required. |
| jbb sulphur pitch execution | Steam Jacketed Valves with steam traced shafts for molten sulphur and pitch applications |
| jbb ordering feature codes | J = Steam jacket, T = Steam-traced shaft |
| jbb jacketed when required by application | Steam jacketed and steam traced shafts when required by application. No elastomers or teflon. |
| jbc feasibility factors | A lug-style butterfly valve can use a steam jacket, but feasibility depends on body geometry, flange-bolt access, allowable thermal distortion, steam-side design conditions, and the actual location of the deposit. |
| jbc sticking location diagnosis | Identify where sticking begins: body cavity, disc edge, stem bearing, or packing area. |
| jbc thermal survey points | Take simultaneous temperature readings on the upstream pipe, downstream pipe, body near both flanges, body centerline, upper and lower body regions, stem-bearing area, and packing area. |
| jbc metal temperature basis | Compare that target with measured metal temperature rather than steam supply temperature. Steam can be hot while a blocked condensate path or poor thermal contact leaves the valve cold. |
| jbc short face to face conduction | Short face-to-face valves can receive substantial conductive heat from the upstream and downstream piping. That heat path may already keep the main body warm, while exposed lugs, the stem extension, packing, actuator bracket, and ambient airflow create localized losses. |
| jbc deposit localization rule | If the deposit is concentrated around the stem bearing or packing, a full body jacket may consume steam without heating the controlling cold spot. If deposits cover the disc and internal body surfaces, localized stem heating will not address the obstruction. |
| jbc condensate drainage | Route steam and condensate so condensate drains from the low point in every installed valve orientation. Trapped condensate reduces heat transfer and can impose mechanical loads during startup. |
| jbc access and spacer rule | Preserve access to every lug, flange bolt, packing adjustment, actuator fastener, and valve-removal path. The jacket must not become a structural spacer between the valve and mating flanges. |
| jbc thermal expansion effects | Excessive or uneven heating can change bearing clearance, seat contact, disc alignment, operating torque, and shutoff performance. Account for jacket mass, steam piping loads, insulation mass, and thermal movement. |
| jbc purpose designed jacket | A purpose-designed jacketed valve or manufacturer-approved removable jacket avoids uncontrolled alteration of the original body. |
| jbc least intrusive selection | Select the least intrusive method that holds every deposit-prone surface above the defined target. |
| jbd tail gas steam jacket | Tail Gas Butterfly Valves are equipped with steam jackets to prevent media from solidifying. |
Kapsam ve kaynak notları
| jacketed flange oversize | Jacketed flange oversize: OEM pages state jacketed connecting flanges run one to two nominal sizes above the standard butterfly valve, while line-size full-jacket executions keep standard flanges via tapped bolt-hole inserts - coverage style determines whether flanges grow. |
|---|---|
| standards layering | Standards layering: butterfly product standards (API 609, MSS SP-68, EN 593, ISO 5752/EN 558 face-to-face, API 598/ISO 5208 testing) and jacket-fabrication standards (ASME B16.10/B16.34, B31.1/B31.3 jacket hydro, API 598 process side) address different layers of the same jacketed valve; face-to-face is frequently "ISO 5752 or approved manufacturer drawing". |
Sipariş ve dokümantasyon
Dokümanlar
İhtiyacınız olan dokümantasyon setini talep ile birlikte isteyin — bu icra için tipik kalemler (malzeme sertifikaları, listelenen denetim standardına uygun test raporları, boyut çizimleri) teklifte teyit edilir ve onunla birlikte tedarik edilir.
Teklif
Teklife hazır bir talep şunları belirtir: nominal boyut ve basınç sınıfı, gövde ve yatak malzemesi tercihi, uç bağlantısı, tahrik ve sıcaklıkla birlikte görev ortamı. Bu sayfadaki tipik değerler kıyaslama referans aralıklarıdır; bağlayıcı değerler teklifte teyit edilir.
Numune ve tedarik
Tedarik şartları, sipariş adetleri ve teslim süresi sipariş başına kararlaştırılır — talep ile birlikte varış ülkesini ve gerekli takvimi belirtin.
Depolama ve sevkiyat
Vanaları yatakları ve sızdırmazlık elemanları UV, ozon ve deformasyondan korunacak şekilde depolayın, uç yüzey koruyucularını montaja kadar takılı tutun; elastomer veya PTFE yataklı icralarda uzun süreli açık alanda depolamadan kaçının — yatak bileşikleri doğrudan güneş ışığında ve don koşullarında en hızlı yaşlanır.
Sık sorulan sorular
ceketli kelebek vanalar için bir teklif sorgusu neyi içermelidir?
Geçerli norm ve sınıf, nominal boyut, gövde ve sedir malzemeleri, sıcaklığıyla servis ortamı ve varış yeri — eksik olan her şey teklif sırasında doğrulanır.
ceketli kelebek vanalar içinde hangi boyut ve basınç derecesi mevcuttur?
Bu vana için doğrulanmış bir boyut ve basınç derecesi aralığı henüz bu sayfada yayımlanmamıştır — göreviniz için uygun boyut ve basınç derecesi önerilir ve teklif sırasında doğrulanır. Servis koşullarını sorguyla birlikte gönderin; seçim, teklifte belirtilir.
ceketli kelebek vanalar içinde hangi gövde malzemesi mevcuttur?
Bu vana için doğrulanmış bir gövde malzemesi aralığı henüz bu sayfada yayımlanmamıştır — göreviniz için uygun gövde malzemesi önerilir ve teklif sırasında doğrulanır. Servis koşullarını sorguyla birlikte gönderin; seçim, teklifte belirtilir.
Bilgi: seçim rehberleri
Ceketli Kelebek Vanalar için teklif isteyin
Gereksiniminizi buradan gönderin — teklife hazır bir talep, yönetici standart ve sınıfı, boyutu, malzemeleri, ortamı, sıcaklığı ve varış ülkesini belirtir.
Bilgilerinize ne olacağı gizlilik bildirimimizde açıklanmıştır.
Daha büyük veya standart dışı bir gereksinim mi hazırlıyorsunuz? Ceketli Kelebek Vanalar teklif rehberi neleri dahil edeceğinizi, standart aralıkları ve özel seçenekleri, eklenecek dokümanları açıklar.
Ceketli Kelebek Vanalar için teklif alın
Teklife hazır bir talep için standart, basınç sınıfı ve boyutu gönderin — dokümanlar ve şartlarla yanıtlarız.